DELTA 1 DEB, 42639

Orbit data source: Space-Track

DELTA 1 DEB, 42639 is space debris in SSO originally from a launch on Thu, 12 Jun 1975 UTC launched from the Air Force Western Test Range (AFWTR). Debris objects in space refer to the collection of defunct objects orbiting the Earth. Examples of debris include non-operational satellites, rocket bodies, and fragments generated from explosions, collisions, or faulty payload assembly.

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https://www.satcat.com/sats-embedded/42639?theme=dark&initialShowStats=false

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Identifier

42639, 1975-052LY

Orbit

SSO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Unknown

Mission

Spacecraft

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

1975-06-12 (51 years ago)

Launch vehicle

Unknown

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown shape, 0.1 m

Radar Cross Section

Small (<0.1 m²)

Expand to show TLE details & history
Last TLE update: 3 days ago

TLE from 3 days ago

0 DELTA 1 DEB
1 42639U 75052LY  25346.81044372  .00000075  00000-0  23835-3 0  9998
2 42639  99.6879 173.5372 0071194 116.5529 261.5959 13.31661614586001

Epoch: 2025-12-12T19:27Z

TLE epoch observation values (Epoch: 2025-12-12T19:27:02.337Z)

Latitude

17.07623°

Longitude

157.04°

Altitude

1,150.857 km

Speed

7.275 km/s

True Right ascension

11h 22m 11s

True Declination

16° 59' 06"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

18:50:43

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,191.337 km

Perigee altitude

1,084.318 km

Semi-major axis

7,515.964 km

Eccentricity

0.00712

Inclination

99.6879°

RAAN

173.5372°

Arg. of periapsis

116.5529°

True anomaly

260.78991°

Mean anomaly

261.5959°

Eccentric anomaly

261.1928°

Mean motion

3.33093 °/min

Orbital period

108.08 mins

BSTAR

0.00023835

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Other satellites on launch #52 in the year 1975 (1975-06-12 UTC)

DELTA 1 DEB, 21431 (Decayed)

DELTA 1 DEB, 7965 (Decayed)

DELTA 1 DEB, 21495 (Decayed)

DELTA 1 DEB, 21672 (Decayed)

DELTA 1 DEB, 21679 (Decayed)

DELTA 1 DEB, 21378 (Decayed)

DELTA 1 DEB, 21517 (Decayed)

DELTA 1 DEB, 21505 (Decayed)

DELTA 1 DEB, 26836

DELTA 1 DEB, 21564 (Decayed)

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DELTA 1 DEB Visibility forecast

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Span	Click to sort rows by Start time (UTC) header in descending order	Start Az.	Max El. time (UTC)	Max El. Az.	Max El.	End time (UTC)	End Az.
4 mins	2025-12-15 23:46:15.641Z	71.273° E	2025-12-15 23:48:15.641Z	89.637° E	11.861°	2025-12-15 23:50:15.641Z	107.774° ESE
12 mins	2025-12-16 01:30:15.641Z	16.614° NNE	2025-12-16 01:35:15.641Z	51.532° ENE	44.636°	2025-12-16 01:42:15.641Z	194.141° SSW
6 mins	2025-12-16 03:19:15.641Z	324.691° NNW	2025-12-16 03:21:15.641Z	303.708° NW	16.549°	2025-12-16 03:25:15.641Z	265.696° W
11 mins	2025-12-16 11:51:15.641Z	134.422° SE	2025-12-16 11:56:15.641Z	61.495° ENE	36.975°	2025-12-16 12:02:15.641Z	356.639° N
10 mins	2025-12-16 13:38:15.641Z	213.974° SW	2025-12-16 13:42:15.641Z	257.043° W	25.481°	2025-12-16 13:48:15.641Z	321.64° NNW

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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Check out DELTA 1 DEB, 42639 on other resources

View DELTA 1 DEB, 42639 on Heavens-Above

View DELTA 1 DEB, 42639 on Keep Track

View DELTA 1 DEB, 42639 on Celestrak

View DELTA 1 DEB, 42639 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

DELTA 1 DEB, 42639

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 3 days ago

TLE from 3 days ago

TLE epoch observation values (Epoch: 2025-12-12T19:27:02.337Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #52 in the year 1975 (1975-06-12 UTC)

DELTA 1 DEB Visibility forecast

Co-orbital & Co-planar RSOs

Check out DELTA 1 DEB, 42639 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 3 days ago